The pollen present in the air comes essentially from pine, olive, holm oak and other oak trees and also from, nettles, grasses, plantain and sorrel.

In the Archipelago of Madeira and the Azores, atmospheric pollen is expected to occur at a low level.

According to SPAIC, outdoor activities should be avoided when pollen concentrations are high.

It also recommends keeping the car windows closed whenever you travel, to reduce contact with pollen. Motorcyclists must wear a full face helmet.

Every week, the pollen bulletin publishes the levels of pollen in the atmosphere, collected by reading posts in various regions of the country.